caa a22 4500 606194622 CHVBK 20210128100915.0 cr unu---uuuuu 210128e20150201xx s 000 0 eng 10.1007/s10934-014-9893-5 doi (NATIONALLICENCE)springer-10.1007/s10934-014-9893-5 Mesoporous materials with enhanced porosity and acidity to obtain clean fuels from low-density polyethylene (LDPE) cracking [Elektronische Daten] [L. Juárez-Hernández, J. Pérez-Pariente, J. Aguilar-Pliego, V. Múgica-Álvarez, M. Gutiérrez-Arzaluz, M. Grande, C. Márquez-Álvarez, E. Sastre] Mesoporous materials with Si/Al ratio 7, 19 and 23 have been synthesized from ZSM-5 zeolite precursors prepared from tetrapropylammonium cations-containing clear aluminosilicate solutions, in the presence of the surfactant cetyltrimethylammonium bromide, and by employing different precursors of secondary mesoporosity or mesoporogen agents, such as nanometric carbon particles (BP700 and BP2000) and the biopolymer chitosan. The synthesized materials were characterized by X-ray diffraction, FT infrared spectroscopy, thermogravimetric analysis, electron microscopy, chemical analysis and nitrogen adsorption. It has been found that the effect of the pore-forming agents depends on the Si/Al ratio of the material, it is very small for Si/Al=7, while for Si/Al above 19, there is a substantial increase of the secondary mesoporosity due to the mesoporogen agent, being this effect more evident for the sample with Si/Al=23. For this material, in addition to the porosity associated to pores with a narrow size distribution centered at 3.7nm due to the surfactant, secondary mesopores with a size distribution centered at 20-30nm for carbon nanoparticles and in the range 4-10nm for chitosan, are also detected. The acidity of the samples increases with their Si/Al ratio, and no significant effect of the porogen agent on the acidity has been found. The catalytic properties of these materials were tested in the conversion of m-xylene and in the cracking of low-density polyethylene (LDPE). Noticeable differences in the activity and selectivity of the gas/liquid products obtained in the catalytic cracking of LDPE were observed. Springer Science+Business Media New York, 2014 MCM-41 nationallicence Mesoporous materials nationallicence Chitosan nationallicence Nanometric carbon nationallicence Xylene nationallicence Low-density-poly-ethylene (LDPE) nationallicence Juárez-Hernández L. Departamento de Química Aplicada, UAM-A, San Pablo 180, C.P. 02200, México, D.F., Mexico aut Pérez-Pariente J. Instituto de Catálisis y Petroleoquímica, CSIC, C/Marie Curie 2, 28049, Madrid, Spain aut Aguilar-Pliego J. Departamento de Química Aplicada, UAM-A, San Pablo 180, C.P. 02200, México, D.F., Mexico aut Múgica-Álvarez V. Departamento de Química Aplicada, UAM-A, San Pablo 180, C.P. 02200, México, D.F., Mexico aut Gutiérrez-Arzaluz M. Departamento de Química Aplicada, UAM-A, San Pablo 180, C.P. 02200, México, D.F., Mexico aut Grande M. Instituto de Catálisis y Petroleoquímica, CSIC, C/Marie Curie 2, 28049, Madrid, Spain aut Márquez-Álvarez C. Instituto de Catálisis y Petroleoquímica, CSIC, C/Marie Curie 2, 28049, Madrid, Spain aut Sastre E. Instituto de Catálisis y Petroleoquímica, CSIC, C/Marie Curie 2, 28049, Madrid, Spain aut Journal of Porous Materials Springer US; http://www.springer-ny.com 22/1(2015-02-01), 269-281 1380-2224 22:1<269 2015 22 10934 https://doi.org/10.1007/s10934-014-9893-5 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10934-014-9893-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Juárez-Hernández L. Departamento de Química Aplicada, UAM-A, San Pablo 180, C.P. 02200, México, D.F., Mexico aut NATIONALLICENCE 700 1- Pérez-Pariente J. Instituto de Catálisis y Petroleoquímica, CSIC, C/Marie Curie 2, 28049, Madrid, Spain aut NATIONALLICENCE 700 1- Aguilar-Pliego J. Departamento de Química Aplicada, UAM-A, San Pablo 180, C.P. 02200, México, D.F., Mexico aut NATIONALLICENCE 700 1- Múgica-Álvarez V. Departamento de Química Aplicada, UAM-A, San Pablo 180, C.P. 02200, México, D.F., Mexico aut NATIONALLICENCE 700 1- Gutiérrez-Arzaluz M. Departamento de Química Aplicada, UAM-A, San Pablo 180, C.P. 02200, México, D.F., Mexico aut NATIONALLICENCE 700 1- Grande M. Instituto de Catálisis y Petroleoquímica, CSIC, C/Marie Curie 2, 28049, Madrid, Spain aut NATIONALLICENCE 700 1- Márquez-Álvarez C. Instituto de Catálisis y Petroleoquímica, CSIC, C/Marie Curie 2, 28049, Madrid, Spain aut NATIONALLICENCE 700 1- Sastre E. Instituto de Catálisis y Petroleoquímica, CSIC, C/Marie Curie 2, 28049, Madrid, Spain aut NATIONALLICENCE 773 0- Journal of Porous Materials Springer US; http://www.springer-ny.com 22/1(2015-02-01), 269-281 1380-2224 22:1<269 2015 22 10934